grubb



(No Model.)

J. H. GRUBB, W. L. RODGERS 8u J. BONAR. GAGBCOGK. No. 532,779. Patented Jan. 22, 1895.

NITED STATES .'PATENII NEIGE.

.IosEPH H. GRIIBB, WILLIAM L. RoDGERs, AND JAMES BoNAR, oF PITTS- BURG, PENNSYLVANIA, AssIGNoRs To THE PITTSBURGH GAUGE GoM- PANY, OF SAME PLACE.

GAG E-COCK.

SPECIFICATION forming part of Letters Patent No. 532,779, dated January 22, 1895.

. Application filed April 21, 1394.

To @ZZ whom it may concern.-

Be it known that we, J`OsEPH I-I. GRBB,

- WILLIAM L. RoDGERs, and JAMES BoNAR,

citizens of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in Gage-Cocks, of which the following is a specication.

In the accompanying drawings which make part of this specication, Figure 1, isacentral longitudinal section of thegage cock with the lever partly in elevation. Fig. 2, is a side elevation of a modification, and Fig. 3, a like View of another modification.

Our invention relates to water gage cocks for steam boilers, vand has, for its object,cer tain devices for keeping the valve normally up against its seat, as well as the more satisfactory draining of the valve chamber, a better reseating of the self-grinding valve s o as to prevent leakage, and means for preventing the blowing out of the steam or water around the upper end of thel valve stem.

1n the accompanying drawings, which make part of this specification, the case of the cock has the usual threaded projection 1, for screwing into the boiler or into a shank to be screwed into the boiler. Above said projection 1, is the valve-seat 2, followed bya short cylindrical chamber 3, which opens into a spherical chamber 4 provided with vent 5. 6 is a partition across said spherical chamber, perforated for the passage of the valve stem 7. 8 is the valve on said stem. 9, 9, are` the spirals above said valve, and 10 a detachable cap for said stem. Suitably secured, here shown as screwed upon the upper part 11 of the case, is'a bracket 12, to which at 13 is pivotally secured a handlever. 14 is a spring attached to the hand lever and to the bracket. The hand lever consists of an L with long arm 15 and short arm 16, the latter adapted when thrown forward and down to bear upon the cap 10 of the valve stem.

Projecting from the under side of the short arm 16 is a smaller L-shaped lever 17 terminating in a claw, 1S, which is adapted to engage the under side of cap 10, owing to spring 14. When a gage cock can be set in the position Serial No. 508,518. (No model.)

shown in Fig. 2, the weight of'the hand lever can be made sufficient without any spring to pull the valve stem out of the case and seat the valve.

In the form shown in Fig. 3, a weight 19, preferably sliding and secured by set screw 20, is put upon arm 21, which forms an eX- tension of L-shaped lever 17, said lever having an opening for'the passage of the valve stem.

The advantages of our invention are these. Since the cylindrical chamber 3 is short and opens abruptly into chamber 4 of much larger capacity, when the Valve Sis open the steam will rush with great force through the cylindrical chamber expanding into the spherical chamber. The spirals on the valve stem will cause the same to rotate with great rapidity and the valve vwill be very accurately and satisfactorily ground into its seat; also the rapid expansion of the steam into the spherical chamber will bear along all sediment and dirt and discharge the same through the vent, preventing cloggingin the valve-chamber, the spirals conveying away the sediment. To prevent the steam or water blowing through and along the valve-stem we prefer to insert the partition wall 6, but this is not indispensable. The partition 6 'forms a siphon by projecting slightlyinto the vent, tending to assist in the drainage and forming a guide for the stem. When the valve is to be closed, the pressure of the hand being removed from the lever, the valve will shut either through the action of the spring, the weight,'or the weight of the lever alone.

The hand ,lever acts both as a kuockerfon the cap to push the valve stem in as well as a pullon the valve stem when the hand pressure ceases. These various styles of hand levers are applicable to all kinds of gage cocks Ahaving a moving valve' stem, and we intend to claim the same broadly.

Obviously the positions of the spring and weight may be varied and the support for the hand lever much modified. f

The claw engaging the under side of vcap of valve stem may have one or more ngers.

Having described our inventiom'we claim- 1. In gage cocks, the combination of a case;

a movable rotary valve stem in said case, means for rotating the valve when opened and a handlever connected with said case adapted normally to tend to pull the Valve stem outwardly from the case, and to push the valve stem in when power is applied to the lever.

2. In gage cocks, the combination of a case; a rotary movable valve stem in said case; means for rotating the valve when opened, a hand lever pivotally secured to said case and means for retracting the hand lever whereby an outward pull will be exerted on the valve stem.

3. In gage cocks, the combination of a case; a movable'rotary valve stem in said case; a hand lever pivotally secured to said case, and having two projections, one adapted to engage the under side of the cap of the valve stem, and the other the top of said cap when the hand lever is actuated.

et. In gage cocks, the combination of a case; a movable valve stem in said case; a hand lever pivotally secured to said case and having a projection to engage the capot= the valve stem when the lever is operated, a second projection and means for retracting the hand lever whereby an outward pull will be exerted upon the valve stem and adapted to engage the under side of said cap of the valve stem.

5. In gage cocks, the combination of a case; a movable valve stem in said case, and a spring actuated hand lever pivotally secured to said case, and having one projection adapted normally to engage with the under side of the cap of said valve stem, and a second projection adapted to push in said valve stem when the lever is actuated.

6. In gage cocks, the combination of a case; a movable valve stem in said case and a spring actuated hand lever pivotally secured to said case, `and having a claw adapted normally to engage with the under side of the cap of lsaid valve stem.

In testimony whereof we have hereunto set our hands this 145th day of April, A.D. 1894.

JOSEPH. H. GRUBB. WILLIAM L. RODGERS. J AMES BONAR.

W'itnesses:

C. C. LEE, WILLIAM L. PIERCE. 

